Lock.



A. A. PAGE.

LocK.

APPLICATION F|LED 0CT.19, 194. 1,137,786. Patented May 4, 1915.

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UNITE AVIS ALBERT A. PAGE, OF EAST HAVEN, CONNECTICUT, ASSIGNOR T0 SARGENT t COMPANY, OF NEW HAVEN, CONNECTICUT, A. COB'BOBJATION 0F CONNECTICUT.

Specification of Letters Patent.

Patented May 4, 1915.

Application filed October 19, 1914. Serial No. 867,391.

T0 all whom t may concern.'

Be it known that I, ALBERT A. PAGE, a citizen of the United Sta-tes, residing in the town of East Haven, county of New Haven, and State of Connecticut, have invented certain new and useful Improvements in Locks, of which the following is a full, clear, and exact description.

This invention relates to locks, and more particularly to extensible cylinder locks, which are adjustable for application to doors of diierent thicknesses.

The primary obj ect of the invention is the production of an extensible cylinder lock having improved means for connecting the key plug with the bit or rollback in all positions of the latter, whereby the device as a whole is simplified and improved from a manufacturing standpoint, as well as the standpoint of application or use, and the cost of production lowered. y Y

Another object of the invention is to provide a cylinder lock which combines a maximum range of adjustment with the use of comparatively few parts.

To these and other ends, the invention consists in the novel features and combinations of parts to be hereinafter described and claimed.

In the accompanying drawing, Figure 1 is a side elevation of a cylinder lock embodying my improvements, showing the same in the shortest adjustment; Fig. 2 is a similar view from the opposite side of the lock, showing a somewhat longer adjustment; Fig. 3 is a rear end elevation of the lock; Fig. 11 is a section Online 4.-4 of Fig. 3; Fig. 5 is a section on line 5-5 of Fig. 2;' Fig. 6 is a detail perspective view of a portion or' the key plug and the extension or coupling member integral therewith; Fig. 7 is a fragmentary section on line 7-7 of Fig. 2, and Fig. 8 is a view similar to Fig. 7, showing a somewhat modied construction.

My improved cylinder lock comprises a main part or cylinder lock proper 10 and an extension 11 adjustably connectedtherewith. The main part 10 is, for the most part, of usual construction. having a case 12, a Jface plate or escutcheon 13, a pin tumbler extension 14, a key plug 15, a retaining washer 16 for the key plug, and the usual pin tumblers (not shown). In the embodiment illustrated, the cylinder extension 11 comprises a disk 17, having exterior screw threads 1S, and provided at its rear end with a rotatably mounted bit or rollback 19 of the usual form. At one side of the main part 10 is a lug 20 engaged by an adjusting screw 21. The head 22 of the adjusting screw 21 is rotatably mounted in the disk 17 of the cylinder' extension 11, as shown in Fig. 7, and is provided with a nick 23 for a screw driver, so that by turning the screw 21 in one direction or the other, the lock proper and the extension may be brought together, as shown in Fig. 1, or separated, as shown in Fig. 2. On the other side of the mainpart 10 is a lug 24., which is engaged by a smooth guide pin 25 rigid with the extension 11. A suitable stop 26 at the free end of guide pin 25 may be used for preventing the main part of the lock and the extension from becoming completely disengaged from each other.

In accordance with my invention, the operative connection of the key plug 15 with the rollback 19 Vis eiected in substantially the following manner: The key plug is provided at its rear end with an integral extension 27 adapted to telescope with a part carrying the rollback 19. rIhe extension 27 may be readily formed on the key plug in the process .of manufacturing the latter. The extension 27 is of polygonal crosssection, and moreover it extends around the keyway 28, as shown in Fig. 6. By preference, the part 27 will be rectangular in cross-section, and it will inclose the keyway at the top and sides but not at the bottom. The rear extremity of the part 27 extends into a correspondingly formed aperture 29 in a collar 30 rotatably mounted in the extension 11. lThe collar 30 is round and fits snugly in a round hole 31 of the disk 17, being provided at the front end with a shoulder 32 fitting a counter-bore in the disk so as to prevent rearward displacement of the collar relative to the extension. At ythe rear of the collar 30, the same has applied theretor the bit or rollback 19, which may be secured to the collar by means such as the .screws 33. The rollback 19 is provided with a recess 311m line with the recess 29 (Fig. 5), so that in the shortest adjustment of the cylinder lock the extension on the key plug may extend completely through the collar and the opening in the rollback, as shown more particularly in Fig. 4. The washer 16 110 part with a tenon 36V projecting rearwardly' kso for retaining'the key plug in the lock proper is secured to the rearv end of the key plug by screws 35 located on opposite sides of the extension 27. The washer is, of course, provided with an opening which iits around and conforms to the extension on the key plug. The collar 30 is provided at its upper from the disk 17, and fitting the upper portion of the opening 34 in the rollback 19, whereby the mounting of the rollback on the cylinder extension is strengthened.

Fig. 1 shows the position ofthe parts in the shortest adjustment of the cylinder lock and Fig. 2 shows a longer adjustment. The member 27 which telescopes the supporting collar or member of the rollback 19 engages said member'non-rotatively so lthat the rotary movement of the key plug will be effectively transmitted to the rollback in all the various positions towhich the cylinder extension 11 may be adjusted. One of the main advantages resulting from my invention lies in the fact that while the part 27 serves permanently as an eliective coupling member between the key plug and the rollback, as stated, it does not in any way interfere with the key, inasmuchas it extends around the keyway, or, in/other words, is provided with a portion of the keyway. Hence a lock is produced in which the case 12 maybe considerably shorter than the shank of the key. Therefore it will be apparent that the invention provides a cylinder lock which may be very short in theadjustment of minimum length, while the adjustment to maximum length depends` only on the length of the coupling member.

In Fig. 8, I have shown a modilied arrangement of adjusting screw 21a. In this case, the head 21b ot the screw is fixed in the cylinder extension, and the threaded shank of the same passes with a certain amount of clearance through an opening 20a in a lug 20b on the main part of the lock. Lock nuts 22a` and 22h threaded on the screw at opposite sides of the lug 20b are adapted to contact with the respective faces of said lug. The adjustment of the cylinder extension may be obtained in an obvious manner by releasing one of the lock nuts and Vtightening said coupling member; substantially as de- Y Y scribed.l

2. In an extensible cylinder lock, the combination with the main part of the lock, of

a coupling member integral with the key plug, and presenting upright walls on opposite sides of the keyway, and between which walls the key may be inserted, and a cylinder extension having a rollback connected with said coupling member; substantially as described. c 3. In an extensible cylinder lock, the combination with the main part of the lock, of a coupling member integral with and projecting rearwardly from the key plug, said member presenting an extension ofthe keyway and having walls inclosing the keyway at the top and at the sides, a retaining washer for the key plug surrounding and conforming to said coupling member, and a cylinder extension having a rollback carrier tele? scoping said coupling member; substantially as described. y

In witness whereof, I have hereunto set my hand on the 16th day of October, 1914.

ALBERT A. PAGE-j Witnesses Y MABEL A. Bossa, c CATHERINE BRENNAN.

Copies oiV this patent may be obtained for ve cents each, by addressing the Commissioner o f PatentI Washington, 1).. C. 

